Emptying fuel tank if more than 3/4 full, CBTA, CBUA — VW
Emptying fuel tank if more than 3/4 full, CBTA, CBUA on VW: 12 steps, engines CBTA, CBUA. What to remove, in what order, and what to check after.
Workshop procedure for VW — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: VW Golf VI (5K, 2008–2013); platform code 521
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- A mark (arrow) at distance (a) = 1500 mm from end of extraction hose.
- Push extraction hose into fuel tank until marking on hose (arrow) coincides with shaft end.
- Push extraction hose of extraction unit into fuel tank until previously attached marking (arrow) on hose coincides with filler neck (2).
- When no more fuel is extracted, the tank is emptied just enough for the sender flange to be opened without danger.Draining fuel tank completely
📋 Procedure
- ⚠ Secure earth wire of fuel extractor to a bare metal part of the body.To extract E 85 fuel, use only fuel extractorVAS 5190 A! — Observe safety precautions .
- Observe rules for cleanliness .
- Remove cone piece (2) from shaft (1) of fuel extractorVAS 5190.
- A mark (arrow) at distance (a) = 1500 mm from end of extraction hose.
- Use insulating tape for this.
- Open tank flap.
- Remove cap (arrow) from fuel filler neck.
- Screw shaft (1) of fuel extractorVAS 5190 onto fuel tank filler neck.
- Push extraction hose into fuel tank until marking on hose (arrow) coincides with shaft end.
- Push extraction hose of extraction unit into fuel tank until previously attached marking (arrow) on hose coincides with filler neck (2).
- Drain fuel tank via filler neck as far as possible. [Note: There is a flap (1) on the lower end of the fuel filler neck in the fuel tank which must not be damaged by the extraction hose. Therefore push hose into filler neck only as far as marking (arrow).If the extraction hose catches on the non-return valve when being extracted, do not apply force to pull the extraction hose out.In this case, remove the fuel delivery unit and open the non-return valve manually. Ensure that your arm does not come into contact with fuel.]
- Pull extraction hose out carefully. [Note: When no more fuel is extracted, the tank is emptied just enough for the sender flange to be opened without danger.Draining fuel tank completely]
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Who makes these pages, and how
TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.
The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.
Variants of the same model differ. Cross-check torque against the factory manual for your engine before final tightening.
Seen a figure that does not match your manual? Write to us — we correct it and note when. support@torqfix.com
The story behind TorqFix →Workshop data on this page last updated 20 Sep 2026.